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New observations of planet b in the TRAPPIST-1 system reveal that the rocky world is more complex than we thought, affirming the challenges of drawing solid conclusions based on a narrow band of spectral information.that determined the exoplanet was likely to be bare and barren, new data obtained using JWST suggest that TRAPPIST-1b is either roiling with geological activity, or possibly shrouded in a thick atmosphere rich in carbon dioxide.
This raised hopes that one of the TRAPPIST-1 worlds might be habitable. It also gave us several exoplanets that may be analogous to worlds within the Solar System, with comparable sizes and densities to Earth, dealt a blow to that idea. It was based on just one infrared wavelength – 15 microns – which is strongly absorbed by carbon dioxide. The strong 15-micron signature suggested that no carbon dioxide was present.
This could indicate that TRAPPIST-1b has tectonic or volcanic activity, or that the gravitational tugging of the star and the other exoplanets in the system are stretching and squeezing TRAPPIST-1b to keep its interior hot and molten.
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